Answer:
its scientific notification is 5×10^9
 
        
                    
             
        
        
        
Answer:
0.2752512
Step-by-step explanation:
The formula you are looking for is the binomial probability:
                
                 n!
P (X) = ------------    * (P)^X  * (q)^n - X
            (n- X)! X!    
For your particular problem:
n=7
X=2
  
q = 1-p = .8
7!/(5!*2!)*(.2)^2*(.8)^5 = 0.2752512
Hope this helps, have a nice day/night! :D
 
        
             
        
        
        
Answer:
a) Ans: 8.5 miles per hour 
b) Ans: 46.75 miles 
Step-by-step explanation:
a) Speed = Distance/Time
 8.5/1h = 8.5 miles per hour 
b) Distance = Speed x Time 
 8.5 miles per hour x 5.5h = 46.75 miles 
 
        
             
        
        
        
The value of D should be 4